Capacity requirement is invalid

What causes this issue?

A capacity requirement has an invalid value. Depending on the resource
used and the type of the activity, the following values are valid:
If the capacity requirement is to be scheduled for a <zh>single
resource</>, it must have the value <zh>1</>.
If the capacity requirement is to be scheduled for a <zh>multiresource
</>, it must have a value greater than <zh>0</>.
If the capacity requirement is assigned to an <zh>SNP activity</>, it
must have the value <zh>0</>.
If the capacity requirement is to be scheduled for a <zh>resource
without time-continuous capacity</> (for example, a bucket or
transportation resource), it must have the value <zh>0</>.

System Response

The system cannot create or change the order.

How to fix this error?

Enter a valid value in the associated plan (PPM, iPPE process
structure, iPPE runtime object).
INCLUDE OM_PP_NICHT_LOES_SYSVER OBJECT DOKU ID TX

Procedure for System Administrators

INCLUDE OM_PP_VORG_FUER_SYSVER OBJECT DOKU ID TX
Return code 144 (om_invalid_cap_demand)
Error code COM API
Field CAPACITY_DEMAND in the CAP_REQ_STR table

Error message extract from SAP system. Copyright SAP SE.